Glaciers have served as the natural source of rivers for many generations. But with global warming, the rapid melting of these huge expanses of ice have led to a rise in sea level and flooding of regions where rivers pass through.

These are just some past and present pictures of mighty glaciers that have now reduced in size as a potent warning for what lies ahead.

Source: https://www.indiatimes.com/culture/travel/15-then-and-now-pictures-of-glaciers-around-the-world-that-will-stun-you-and-not-in-a-good-way-232887.html